The search for solar gravity modes

Details The search for solar gravity modes The search for solar gravity modes

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286..419h&link_type=abstract

In ESA, Seismology of the Sun and Sun-Like Stars p 419-423 (SEE N89-25819 19-92)

Physics

7

Helioseismology, Solar Gravitation, Solar Interior, Solar Oscillations, Asymptotic Properties, Pattern Recognition, Solar Observatories

Scientific paper

A solar oscillations observing program of more than 13 yr is reviewed. The observations are most sensitive to low degree solar modes and were used for the study of long period p-mode and g-mode oscillations. At the start of the 1987 observing season (summer) long-standing problems with the instrument were corrected which (along with good weather) allowed the cleanest set of data to date. The search for evidence of g-modes in this data is described. Analysis of this data shows good evidence for g-modes. Various methods were used for mode identification with a statistical search for a simple pattern of even spacing in period selected as the most robust. Using this method, a possible g-mode identification was made with an asymptotic period separation T0 = 37.1 min. This identification is consistent with a rotation splitting of 1.6 MicroHz. Tests with randomly generated spectral peaks find as significant a possible set of modes in only 2 out of 100 cases.

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